Upgrade Express to version 5.2.1 and update related dependencies in package.json and package-lock.json. Refactor server CORS configuration to accommodate Express 5 changes. Enhance routing logic in Vue components for improved path normalization and menu handling. Update HTML asset references for better loading performance and accessibility improvements in various components.

server.js

@@ -85,7 +85,8 @@ app.use(cors({
   methods: ['GET','POST','PUT','PATCH','DELETE','OPTIONS'],
   allowedHeaders: ['Content-Type','Authorization']
 }));
-app.options('*', cors());
+// Express 5 nutzt path-to-regexp v6; '*' ist dort als Pattern ungueltig.
+app.options('/{*any}', cors());
 
 // Erhöhe Header-Limits für große Requests
 app.use(bodyParser.json({ limit: '50mb' }));